I use emacs on different machines. Normally I would want the backspace key to have back-ward delete function. But one of the machines would have it as forward delete function. How can I set it to be back-ward delete function?

The emacs version on the sgi machine I use is

> emacs --version

GNU Emacs 21.3.1

Copyright (C) 2002 Free Software Foundation, Inc.

Any help or tips are appreciated.

LD